The Kurahara family has one son and two daughters. The eldest daughter, Miki, is a serious and reliable girl who is now married and has left home. The second daughter, Mao, is a gentle and kind office lady who lives at home. The youngest child, Kou, is a university student living alone in Tokyo. The Kurahara family has gathered together as a family for the first time in a long time. When Kou returns home, he has gotten a tattoo and has become a rebel! Apparently, a girl in his class that he liked rejected him because she said, "I don't like skinny, weak guys." At first, Miki and Mao are angry and confused, but they decide to step in to help their cute little brother gain some confidence...